Astronomers discover 83 supermassive black holes 13 billion light-years away

Agencies
March 15, 2019

Washington, Mar 15: Astronomers have discovered 83 quasars powered by supermassive black holes 13 billion light-years away from the Earth, from a time when the universe was less than 10 per cent of its present age.

“It is remarkable that such massive dense objects were able to form so soon after the Big Bang,” said Michael Strauss, a professor at Princeton University in the US.

“Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models,” Strauss said in a statement.

This finding, published in The Astrophysical Journal, increases the number of black holes known at that epoch  considerably, and reveals, for the first time, how common they are early in the universe’s history.

In addition, it provides new insight into the effect of black holes on the physical state of gas in the early universe in its first billion years.

Supermassive black holes, found at the centers of galaxies, can be millions or even billions of times more massive than the Sun.

While they are prevalent today, it is unclear when they first formed, and how many existed in the distant early universe.

A supermassive black hole becomes visible when gas accretes onto it, causing it to shine as a “quasar.” Previous studies have been sensitive only to the very rare, most luminous quasars, and thus the most massive black holes.

The new discoveries probe the population of fainter quasars, powered by black holes with masses comparable to most black holes seen in the present-day universe.

The team used data taken with “Hyper Suprime-Cam” (HSC) instrument, mounted on the Subaru Telescope of the National Astronomical Observatory of Japan, which is located on the summit of Maunakea in Hawaii.

The researchers selected distant quasar candidates from the sensitive HSC survey data.

They then carried out an intensive observational campaign to obtain spectra of those candidates, using three telescopes: the Subaru Telescope; the Gran Telescopio Canarias on the island of La Palma in the Canaries, Spain; and the Gemini South Telescope in Chile.

The survey revealed 83 previously unknown very distant quasars.

Comments

ABDUL AZIZ SHE…
 - 
Saturday, 16 Mar 2019

SUBHAANALLAH

 

 
ALLAH ALMIGHTY CREATED EVERTHING  INCLUDING WHOLE UNIVERSE AND WHAT IS IN IT,

HUMAN BEING CANNOT REACH TO UNDERSTAND IT,  HUMAN LIFE NOT SUFFEICENT TO REACH AND KNOW EVERYTHING.

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News Network
January 18,2020

Jan 18: Days after the arrest of Deputy SP Davinder Singh along with two Hizbul Mujahideen terrorists, Shiv Sena on Saturday questioned the role of police in the Kashmir Valley.

"Cross border infiltration is ongoing in Kashmir. But the police machinery is being used to help the terrorists in Kashmir to safely cross the border (to Pakistan) and a President's medal awarded Deputy SP was arrested for doing so. In Kashmir (it seems), the government is using the police for some other purposes, what will the country's Home Ministry say if somebody has a doubt in connection with the Pulwama attacks," Sena mouthpiece, Saamna, read.

This was in reference to the incident in which Jammu and Kashmir police intercepted a vehicle on Sunday and arrested DySP Davinder Singh along with two top Hizbul Mujahideen terrorists, who were travelling together.

The Sena mouthpiece asserted that the impact and acceptance of the Centre removing Article 370 should be visible "through the people" during the upcoming Republic Day celebrations.

"Jammu and Kashmir is now a Union Territory. It is being ruled by the Centre through President's Rule. The government had removed Article 370 in a historic decision...The joy and excitement in the people over the removal of 370 should be visible in the Republic Day celebrations this time. The tricolour should be seen flying over all houses in Kashmir, it is the least that can be expected," it added.

The Sena mouthpiece further said that with the arrest of terrorists in the recent days, it hoped that "Republic Day will be celebrated safely in Delhi, Jammu and Kashmir".

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News Network
February 21,2020

Washington, Feb 21: Days ahead of his India visit, US President Donald Trump on Thursday said the two countries could make a "tremendous" trade deal.

"We're going to India, and we may make a tremendous deal there," Trump said in his commencement address at the Hope for Prisoners Graduation Ceremony in Las Vegas.

Trump, accompanied by First Lady Melania Trump, is scheduled to travel to Ahmedabad, Agra and New Delhi on February 24 and 25.

Ahead of the visit, there have been talks about India and the United States agreeing on a trade package as a precursor to a major trade deal.

During his commencement address, Trump indicated that the talks on this might slowdown if he did not get a good deal.

"Maybe we'll slow down. We'll do it after the election. I think that could happen too. So, we'll see what happens," he said.

"But we're only making deals if they're good deals because we're putting America first. Whether people like it or not, we're putting America first," Trump said.

Bilateral India-US trade in goods and services is about three per cent of the US' world trade.

In a recent report, the Congressional Research Service (CRS) said the trading relationship is more consequential for India -- in 2018 the United States was its second largest goods export market (16.0 per cent share) after the European Union (EU, 17.8 per cent), and third largest goods import supplier (6.3 per cent) after China (14.6 per cent) and the EU 28 (10.2 per cent).

"The Trump Administration takes issue with the US trade deficit with India, and has criticised India for a range of 'unfair' trading practices," the CRS said.

"Indian Prime Minister Modi's first term fell short of many observers' expectations, as India did not move forward with anticipated market opening reforms, and instead increased tariffs and trade restrictions," it said.

"Modi's strong electoral mandate may embolden the Indian government to press ahead with its reform agenda with greater vigour. Slowing economic growth in India raises concerns about its business environment," CRS said.

As per a fact sheet issued by the Council on Foreign Relations (CFR), trade in goods and services between the two countries from 1999 to 2018 surged from $16 billion to $142 billion.

India is now the United States' eighth-largest trading partner in goods and services and is among the world's largest economies.

India's trade with the United States now resembles, in terms of volume, the US' trade with South Korea ($167 billion in 2018) or France ($129 billion), said Alyssa Ayres from CFR.

"The United States for two years now has set out in stone pretty clearly the things that they wanted to see to try to get an agreement, and it's basically then on India's doorstep on whether they want to take those steps," Rick Rossow, Wadhwani Chair in US-India Policy Studies at the Center for Strategic and International Studies think-tank told reporters during a conference call.

"The list of US asks has been pretty static all throughout. Not to say that any of these things are easy for India to do, but the United States to my knowledge didn't change the goalposts just because we now consider India to be a middle-income country. The things that we wanted to see happen to get this trade agreement have been pretty static all throughout, no matter how difficult they are," he said in response to a question.

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News Network
February 22,2020

Johannesburg, Feb 22: To meet shortage of skilled nursing staff, private hospitals in South Africa are recruiting senior Indian nurses for their good work ethics and ability to become efficient trainers for the local staff, according to a media report.

A report at a 2018 jobs summit indicated that the country had a shortage of more than 47,000 nurses.

The shortage of the skilled nursing staff has been attributed to several factors, including preference of highly qualified nurses to emigrate or take up contract employment in countries such as the UK, the United Aarb Emirates, Saudi Arabia or New Zealand for want of higher salaries, a report in the weekly Business Times said.

Mediclinic, one of South Africa's largest private hospital groups, confirmed that it is recruiting 150 nurses from India this year.

“To supplement our training, as an internal strategy, we will continue to recruit senior registered nurses from India,” a Mediclinic spokesperson told the Business Times.

Mediclinic started recruiting nurses from India in 2005 but could not provide details about how many among the more than 8,800 nurses it employs at its hospitals are from India.

Another company, Life Healthcare SA, said it employed 135 Indian nurses between 2008 and 2014.

Top managements at the hospital groups lauded senior Indian nurses as being very efficient trainers for local staff.

“But we find that many of them prefer coming here on short-term contracts due to family commitments," a hospital executive said on the basis of anonymity.

The official said that the few who apply for long-term positions are usually young newly-qualified nurses, which is not the group in demand.

“They work hard, with a patient-oriented work ethic, and do not have the nine-to-five approach of many local nurses, especially those who are unionised," the official said.

“We would be very happy to take in more nursing staff from India," the official added.

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